they typically look at the options an average of 18 times before making up their minds. >> pelley: don, thanks very much. today the justice department dropped its challenge to the merger of american airlines and u.s. airways after the airlines agreed to give up some of their takeoff and landing slots at a number of major airports. that will allow low-cost carriers such as jetblue and southwest to expand. if a judge approves the merger, it will create the largest airline in the world. inspectors are finding hazards in a pipeline designed to stretch across america. experts have made their ruling on whether the new world trade center really is america's tallest tower. and what's wiping out the star fish in california? when the "cbs evening news" continues. amazing prune. enjoy plum amazins, diced prunes. i'd put these on a salad. these would be perfect for cookies. delicious and nutritious sunsweet, the amazing prune. then you'll know how uncomfortable it can be. [ crickets chirping ] but did you know that the lack of saliva can also lead to tooth decay and bad breath? [ exhales deeply ]